releasekey
nounUK /rɪˈliːs kiː/
US /rɪˈliːs kiː/
A key that you press to let something go or open.
Press the release key to open the toy box.
OTHER MEANINGS
2. A key on a device that frees a part so it can move.
The release key on the camera lets the lens pop out.
3. A special key that stops something from being held.
He hit the release key to drop the ball.
4. A key used to set something free from a lock.
The zookeeper used the release key to open the gate.